Fluid power converter side seal

Claim 1

In a fluid power converter having a rotor and a stator member, the members being concentrically mounted and rotatable one with respect to the other about a common axis and having coacting sides, the improvement in seal means between said sides comprising, an annular retainer ring sealably connected to the first of said members, an annular first seal positioned between the coacting sides of said members and coaxially positioned about the retainer ring, means securing said annular seal to said first member for preventing rotation relative to said first member, but allowing movement of said annular seal towards said second member, said first seal including two annular rails protruding toward said second member, resilient means between said annular seal and said first member yieldably urging said annular rails of said annular seal toward said second member, said seal being of a width less than the distance between the coacting sides whereby high pressure between the coacting sides acts on the end of said seal to urge said seal towards the second member, said seal including a passageway extending from between said rails to a position between the coacting sides, and a second seal means between the outside of the retainer ring and the inside of said annular seal whereby the total loading force on the first seal is borne by both rails but only the inner rail acts as a seal.